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US 7,922,451 B1Granted
Turbine blade with blade tip cooling passages
AssigneeFlorida Turbine Technologies, Inc.
InventorGeorge Liang
Life of this patent
Estimating the term…
Abstract
A turbine blade for use in an industrial gas turbine engine, the blade having a squealer pocket with a plurality of discrete curved cooling channels to cool the blade tip and to reduce the hot gas flow leakage across the tip. The curved cooling channels include a side wall cooling channel, a tip rail crown cooling channel and an inner tip rail wall cooling channel all discharging cooling air from a cooling supply channel within the airfoil. Both the pressure side and suction side tip rails include this arrangement of cooling channels.
Claims17
A turbine blade comprising:
- a pressure side wall and a suction side wall;
- a squealer tip formed by a pressure tip rail and a suction tip rail;
- a squealer pocket formed between the pressure and suction tip rails, the squealer pocket having a squealer floor;
- a cooling supply cavity formed within the blade;
- a pressure side wall film cooling channel connected to the cooling supply cavity, the pressure side wall film cooling channel being oriented to discharge cooling air toward the pressure side tip rail crown;
- a pressure side tip rail cooling channel connected to the cooling supply cavity, the pressure side tip rail cooling channel being oriented to discharge cooling air toward a gap formed between the pressure side tip rail crown and an outer shroud forming a leakage flow gap;
- a pressure side pocket cooling channel connected to the cooling supply cavity, the pressure side pocket cooling channel being oriented to discharge cooling air toward the pocket side surface of the pressure side tip rail;
- and,
- the pressure side wall film cooling channel, the pressure side tip rail cooling channel, and the pressure side pocket cooling channel are each discrete curved cooling channels having a curvature in the same direction.
6 more elements
A turbine rotor blade comprising:
- a pressure side wall and a suction side wall;
- a squealer tip formed by a pressure side tip rail and a suction side tip rail;
- a squealer pocket formed between the pressure side and suction side tip rails;
- the squealer pocket having a squealer floor;
- a cooling supply cavity formed within the blade;
- a first cooling air hole connected to the cooling supply cavity and opening onto the pressure side wall just below a pressure side tip rail crown and directed to discharge film cooling air toward the pressure side tip rail crown;
- a second cooling air hole connected to the cooling supply cavity and opening onto the pressure side tip rail crown;
- and,
- a third cooling air hole connected to the cooling supply cavity and directed to discharge cooling air onto an inner side surface of the pressure side tip rail.
6 more elements
Dependencies are inferred from the claim text.